I enjoyed the article. Nothing especially new, but, as ever, readable, concise and enlightening. However, I wonder if I.E. can cite a specific example of a "heretic" astronomer being burnt at the stake?

This most iconic of medieval executions was, in fact, very rarely executed and mostly for treason rather than heresy (and often for female adultery, which was considered a form of treason).

That's not to say that no astronomers were burnt. I just can't find any record of it.